Tom Abel
В роли: Self - Professor, Stanford University, SLAC National Accelerator Lab

Volker Bromm
В роли: Self - Professor, University of Texas at Austin

James Dunlop
В роли: Self - Professor, University of Edinburgh

Stefan Keller
В роли: Self - Phd., Australian National University

Avi Loeb
В роли: Self - Professor, Harvard University

Ross McLure
В роли: Self - Professor, University of Edinburgh

David O'Brien
В роли: Narrator

Steven Tingay
В роли: Self - Professor, Curtin University